How do I bend pipes with Blender modelling tools?
there is different ways to do what you want in blender, one of them is this one:

Add a new bezier circle:

Add a new bezier curve:

With the bezier curve selected, go to Properties menu &gt; Object data &gt; Bevel &gt; Object

Select the bezier circle you previously create.


Now the bezier curve looks like a thick pipe.

You can adjust the pipe thickness by reducing or increasing the bezier circle radius
Now you can manipulate the bezier curve as you want to simulate the pipe bend effect.


For more information about bezier curves visit:
https://docs.blender.org/manual/en/dev/modeling/curves/structure.html#bezier-curves